PDO statements with named parameters VS question mark parameters

Question

I have a class for database management, and one of my sub-classes (the one that defines a query) is defined like this (just a sample, many other functions are actually stripped

Answer 1

Although there is no technical difference (as PDO will just replace named placeholders to question marks internally), there is a usability issue

For the sprintf-like function question marks seems a lot better solution. As they will let you to use indeed sprintf-style (dunno why you're creating a whole class for the query):

$query = new Query("SELECT * FROM t WHERE a=? AND b=?", $ida, $idb);

while with named it will be a lot more verbose